package com.wangjie.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求[ {} ]开始, 时间: {}", uri, start);

        // 响应式编程是异步模式
        Mono<Void> filter = chain.filter(exchange).doFinally(result -> {
            long end = System.currentTimeMillis();
            log.info("请求[ {} ]结束, 时间: {}, 耗时: {}ms", uri, end, (end - start));
        });

        return filter;
    }

    @Override
    public int getOrder() {
        return -1;
    }
}